When is the muslim jugment day?

Nobody knows. There is a hadith which gives the 50 signs of the Judgement day, not ulike the signs given in the Book of Apocalypse.

Like Christians, Muslims believe that the present life is only a trial preparation for the next realm of existence. This life is a test for each individual for the life after death. A day will come when the whole universe will be destroyed and the dead will be resurrected for judgment by God. This day will be the beginning of a life that will never end. This day is the Day of Judgment. On that day, all people will be rewarded by God according to their beliefs and deeds. Those who die while believing that "There is no true god but God, and Muhammad is the Messenger (Prophet) of God" and are Muslim will be rewarded on that day and will be admitted to Paradise forever.

Here are the 50 signs, said to be signs of the coming of Judgement day for the Muslims:

1. Splitting of the Moon.

2. Death of the Prophet Muhammad, may Allah bless him and grant him peace.

3. A form of death which will kill thousands of Muslims. (Understood to refer to the plague of Amwas during the
caliphate of ‘Umar ibn al-Khattab.)

4. A major fighting in Madinah (understood to refer to the battle of al-Harrah during the caliphate of Yazid, 63 AH).

5. The Muslim conquest of Jerusalem.

6. The Muslim conquest of Constantinople.

7. Two large groups of Muslims will fight in war.

8. A war between the Muslims and a reddish people with small eyes, wearing sandals made of hair (understood to refer to
the Mongol Tatar invasion of the Islamic lands.)

9. A peace agreement between the Muslims and non-Muslims from the yellow race (Chinese, Mongols, etc.)

10. Thirty impostors (dajjal) will appear, each thinking he is a prophet.